// Copyright (c) 2010. Eric Nelson  
// https://code.google.com/p/prompts/
// All rights reserved.
//     
// Redistribution and use in source and binary forms,   
// with or without modification, are permitted provided   
// that the following conditions are met:    
// * Redistributions of source code must retain the   
// above copyright notice, this list of conditions and   
// the following disclaimer.    
// * Redistributions in binary form must reproduce   
// the above copyright notice, this list of conditions   
// and the following disclaimer in the documentation   
// and/or other materials provided with the distribution.    
// * Neither the name of Eric Nelson nor the   
// names of its contributors may be used to endorse   
// or promote products derived from this software   
// without specific prior written permission.    
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND   
// CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,   
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF   
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE   
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR   
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,   
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,   
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR   
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS   
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,   
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING   
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE   
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF   
// SUCH DAMAGE.
// 
//     
// [This is the BSD license, see  
// http://www.opensource.org/licenses/bsd-license.php]  
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using Prompts.Prompting.ViewModels;
using Prompts.ReportCatalog.Model;

namespace Prompts.ReportCatalog.ViewModels.Implementation
{
    public class CatalogItemViewModelBuilder : ICatalogItemViewModelBuilder
    {
        private readonly IPromptsViewModel _promptsViewModel;

        public CatalogItemViewModelBuilder(IPromptsViewModel promptsViewModel)
        {
            _promptsViewModel = promptsViewModel;
        }

        public ObservableCollection<ICatalogItemViewModel> BuildFrom(IEnumerable<CatalogItemInfo> catalogItemInfos)
        {
            return new ObservableCollection<ICatalogItemViewModel>(CreateCatalogItems(catalogItemInfos));
        }

        private IEnumerable<ICatalogItemViewModel> CreateCatalogItems(IEnumerable<CatalogItemInfo> itemInfos)
        {
            var viewModelsToReturn = new List<ICatalogItemViewModel>();

            foreach (var itemInfo in itemInfos)
            {
                var viewModel = CreateReportCatalogItem(itemInfo);
                if(itemInfo.Children != null)
                {
                    viewModel.Children = CreateCatalogItems(itemInfo.Children);
                }
                viewModelsToReturn.Add(viewModel);
            }

            return viewModelsToReturn;
        }

        private ICatalogItemViewModel CreateReportCatalogItem(CatalogItemInfo catalogItemInfo)
        {
            switch (catalogItemInfo.Type)
            {
                case CatalogItemType.Report:
                    var reportViewModel = new ReportCatalogItemViewModel(catalogItemInfo, _promptsViewModel);
                    return reportViewModel;
                case CatalogItemType.Folder:
                    var folderViewModel = new FolderCatalogItemViewModel(catalogItemInfo);
                    return folderViewModel;
                default:
                    throw new Exception();
            }
        }
    }
}
